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Observer Based Sensorless Control Seminar Report Abstract


16-08-2013 09:08 AM
An introduction to Observer Based Sensor-less Control
The sensors used in various industrial applications develop snag, mostly in unfriendly environments. Wide use of sensors reduces robustness of the system and also the initial cost is quite high. So, a mechanism is required where dependency on sensors is reduced. In observer based sensor less system, an observer is employed who can provide an estimate of the physical state of a given system which includes accurate measurements of the input and output of the system. The major applications of observer based sensor less controls are mechanically driven systems where speed control of an induction motor is required.

Here, we employ a state observer at the output which estimates the internal state of the system. Knowledge of the system state is required to solve many control panel problems for example stabilizing a system using feedback. We cannot exactly compute the physical state of a system by the method of direct observation. Indirect analysis of the internal states must be done by the way of system outputs. A common example is that of vehicles in a narrow channel, the rates and velocities at which vehicle enters and leaves the tunnel can be identified directly but the exact state inside the tunnel can only be estimated.

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